DE102017000111A1 - Filter element with additional component and filter system - Google Patents

Abstract

The invention relates to a filter element (10) for filtering a fluid with at least one filter bellows (12) which is folded into folds (34) in zigzag fashion on folding edges (26) located in flat sides (38, 39) of the filter bellows (12) each between opposite end edges (22, 23) of the filter bellows (12) and extending on opposite end faces (18, 19) extending parallel to each other end edge surfaces (20, 21). The filter bellows (12) is encapsulated with plastic in the form of a frame (28), so that the end edge surfaces (20, 21) are sealed. It is at least one integral with the frame (28) formed additional component (16) is provided, which on one of the flat sides (38, 39) can be folded flat.
The invention further relates to a filter system (100) with such a replaceable filter element (10).

Description

Technical area

The invention relates to a filter element for filtering a fluid with an additional component, in particular for use as an air filter of an internal combustion engine or as an interior air filter, in particular of a motor vehicle and a filter system with a filter element.

State of the art

Depending on the available space, a winding or stacking body of a filter body and thus the filter can be formed overall flat with a narrow side and a longitudinal side. Narrowed construction conditions can thus make an asymmetrical flow necessary, in which the inflow opening lies in the region of the narrow side of the filter body with angular and positional offset relative to the longitudinal axis of the filter body.

In the EP 2 027 908 B1 is proposed a compact filter, in particular a compact air filter for motor vehicles with a compact filter element for exchangeable use in a filter housing, wherein the compact filter element comprises a filter body having a longitudinal axis. The compact filter element has on its raw side a flow guide element which can be removed together with it from the filter housing and has at least one guide surface which is inclined with respect to the longitudinal axis. The flow-guiding element can be plugged loosely or by clamping on the filter body and is preferably firmly attached to it by means of direct injection molding, for example, to a plastic part connected to the element. It can also be connected by adhesive bonding, lathering or the like. By suitable design of the flow guide, the incoming, dust-laden air flow experiences a deflection at least approximately in a direction which is parallel to the longitudinal axis of the filter body or its air channels. An outflow-side end of the flow-guiding element adjoins an inflow-side end face of the filter body approximately in the region of its longitudinal axis, wherein an inflow-side end of the flow-guiding element lies approximately at a position to be defined of the inlet surface of the filter housing.

Disclosure of the invention

An object of the invention is to provide a filter element for filtering a fluid with an additional component such as a flow guide, which is modular and manufacturable in a simple and cost-effective manner.

Another object is to provide a filter system for filtering a fluid for receiving such a replaceable filter element with an additional component such as a flow guide, which is modular and manufacturable in a simple and cost-effective manner.

The above objects are achieved according to one aspect of the invention of a filter element for a filter system in which a filter bellows is encapsulated with plastic in the form of a frame, so that the end edge surfaces of the filter bellows are sealed, and provided in the at least one integrally formed with the frame additional component is which can be folded flat on one of the flat sides, and according to a further aspect of the invention of a filter system with such a filter element.

Favorable embodiments and advantages of the invention will become apparent from the other claims, the description and the drawings.

It is proposed a filter element for filtering a fluid with at least one filter bellows, which is folded in zigzag folds on lying in flat sides of the filter bellows folding folds, each extending between opposite end edges of the filter bellows and each having on opposite end faces mutually parallel end edge surfaces. The filter bellows is encapsulated with plastic in the form of a frame, so that the front edge surfaces are sealed. At least one integrally formed with the frame additional component is provided, which is flat on one of the flat sides folded. In particular, the additional component can cover the flat side over the entire surface.

In the filter element according to the invention, one or more filter bellows are encapsulated in an injection mold with a plastic, so that the at least one filter bellows is firmly fixed and held in a kind of frame. The frame expediently seals off the end edge surfaces of the filter bellows by also injecting the end edges of the filter bellows. End faces of the filter bellows can be injected with. Alternatively, they can remain open. A circumferential end face of the frame may advantageously be provided with a seal for sealing the filter element when used in a filter housing. Side surfaces of the frame may have stiffening ribs for stiffening large-area filter elements. Also, webs may be arranged for additional stiffening across the surface of the frame. If a plurality of filter bellows arranged side by side and injected, so are expediently for sealing the end edge surfaces over the length of the frame parallel to the outer surfaces of the End edge seals the outer filter bellows also arranged Stirnkantenabdichtungen inside the frame and stiffen the frame and the filter element so in addition.

The encapsulation of a filter bellows with plastic has several advantages. On the one hand, a sturdy frame is created in order to mechanically hold the filter bellows, stabilize them and make them manageable for assembly. On the other hand, the end edge surfaces are thus sealed, so that the filter bellows is thus applicable for use in a filter system.

According to the invention an additional component is provided in the filter element, for example, a flow or a Wasserabscheideelement which is integrally formed with the frame of the filter bellows and which can be folded flat on one of the flat sides of the filter bellows. In this way, the additional component sits directly on the frame and can be firmly connected to this and also sealed. The additional component can be produced together with the frame directly in an injection molding process by additionally provided in the injection mold. The additional component can be connected to the frame via a flexible connection region so that the additional component can be folded over and folded onto the frame with the bent connection region.

In this way, the additional component is very inexpensive to manufacture. Also, if it is not needed in a filter element, it may simply be omitted in the injection molding process, for example, with a slider provided in the injection mold. The slider prevents the additional component from being sprayed. For example, only one injection mold is necessary for producing the frame.

The inventive solution of the integrally manufactured with the frame additional component offers the advantage of easy integration of additional functions in the filter element, combined with a relatively simple production of the additional component.

According to an advantageous embodiment, a connection region for connecting the additional component and the frame to a longitudinal edge of the frame can be connected to the frame. In this way it is ensured that the additional component can be placed flat directly on an end face of the frame on the side on which the longitudinal edge is arranged. Thus, the closest possible folding of the frame and additional component can be achieved, which is favorable for a tight connection of additional component and frame with respect to the flow conditions of the filter element. The filter element can also be designed to be as compact as possible in terms of space, since the frame remains largely free of the connection area.

According to an advantageous embodiment, the additional component and the frame may be formed as an injection molded part. Advantageously, integrally manufactured plastic components are manufactured in a suitable injection molding process, which is suitable as a flexible and cost-effective method for the production of plastic components. If both, additional component and frame, designed as an injection molding, so can the production with a single injection mold implement, which in turn can make the cost of manufacturing the components low. If necessary, can be dispensed with the production of the additional component and only a filter element with the frame are made in this way with the same injection mold by the corresponding part of the injection mold is sealed off by a slide during the injection molding process.

According to an advantageous embodiment, the connection region between additional component and frame may be formed as a film hinge. The connection area between the additional component and the frame is expediently designed to be flexible and flexible, in order to allow folding of the additional component to the frame in a simple manner. Conveniently, the material can be thinned in the connection area. Film hinges in plastic components consist essentially of a thin-walled connection, often in the form of a fold, which allows by their flexibility limited rotational movement of the connected parts. Film hinges are usually associated with wall thickness jumps, but get smooth transitions for the melt flow and stress distribution. Such a film hinge is as a one-piece component, which may be provided in the injection mold together with its components to be joined, namely the frame and the additional component, inexpensive to manufacture and therefore advantageously suitable for the connection area between additional component and frame.

According to an advantageous embodiment, the additional component, in particular with a latching connection, can be locked to the frame. Such locking preferably takes place at least on the side of the frame opposite or facing away from the connecting region, in particular such that the inflow and / or outflow surface, ie one of the flat sides of the bellows, is straddled by the additional component. The additional component can be fixed in different ways after folding on the frame. A simple and flexible way is to to provide a snap or catch connection with the frame. For this purpose, the additional component or the frame are provided for example with snap hooks, which cause after folding of the additional component to the frame snap the snap hooks with the other component. In this way, additional component and frame can be locked together in a simple and reliable way. This locking connection can be made detachable when the additional component is to be folded away again, for example for maintenance purposes. Alternatively, however, it is also possible to perform the locking connection by suitable design of the locking elements not detachable.

According to an advantageous embodiment, the additional component can be connected or connectable to the frame by means of a seal encircling longitudinal edges of the frame. A circumferential seal of the filter element when used in a filter housing is expedient to ensure a reliable separation of the raw side and the clean side of a filter system, as it is advantageous for a reliable filter process over a corresponding service life of the filter system. Advantageously, the circumferential seal on the longitudinal edges of the frame can be arranged so that it comprises a connection zone between the frame and the additional component and so by their strength causes a permanent and reliable connection of the frame and additional component. At the same time, the connection zone between the frame and the additional component is thereby also advantageously sealed off, which proves to be favorable from a fluid engineering point of view.

According to an advantageous embodiment, the seal can be provided in a two-component injection molding process with the frame produced. The seal usually has a different material than the frame, since the seal has to fulfill another function. Therefore, for example, the gasket is made of polyurethane that is flexible enough to achieve a durable sealing function, while the frame may be made of polypropylene or polyester, for example. Conveniently, therefore, the seal can be produced and molded in the production of frame and additional component in a two-component injection molding process. As a result, a suitable seal for the filter element can be achieved in a reliable and cost-effective manner. Frame and additional component can be held together reliably at least during storage and transport. After installation of the filter element in a housing of a filter system, the two components are pressed axially and thereby held together in operation.

According to an advantageous embodiment, the additional component can be connected or connectable by means of gluing or welding to the frame. Another way to connect the additional component to the frame in a durable manner, adhesive or welding processes. All conventional plastic bonding and welding processes can be used, which ensure a non-detachable connection between additional component and frame. With suitable adhesives, however, releasable compounds can also be achieved if, for example, the adhesives soften and dissolve again under the influence of temperature.

According to an advantageous embodiment, the additional component may comprise flow guide elements, which are provided for flow guidance of the fluid. Flow guiding elements can prove to be advantageous both on the raw side and on the clean side. By suitable design of the flow guide, the incoming, dust-laden air flow undergoes a deflection at least approximately in a direction which is parallel to a longitudinal axis of the filter body or its air channels, such as the folds of the filter bellows. The dust particles carried by the air flow are forced to follow this diversion. As a result, a homogenization of the dust load of the filter body is achieved. The usable life is increased. However, the flow guide can also be arranged on the clean air side and thereby cause a uniform outflow of air from the filter element. As a result, the pressure loss through the filter element can be favorably influenced. The individual flow guide elements can have different shapes in order to achieve a favorable flow guidance of the fluid to be filtered. Advantageously, the flow guide can thus be integrated into the filter element, so that it is not necessary, as usual, to provide a second housing for a filter element with flow guide elements.

According to an advantageous embodiment, the flow guide elements can extend parallel to the folded edges. The arrangement of the flow directing elements in such a way that the inflowing air distributes uniformly over the length of the pleats of the filter bellows results in the best possible utilization of the filter capacity of the filter bellows, whereby an effective filtration of the fluid and favorable service life of the filter element is achieved. Such a homogenization of the flow can be achieved if the flow guide elements, which can be configured as blades, are arranged parallel to the folded edges of the filter bellows.

According to an advantageous embodiment, the additional component may have lamellar elements, which for water separation from the fluid are provided. The separation of water, snow, coarse particles and dirt from the air to be filtered before the air enters the filter bellows proves to be favorable because the filter bellows are not loaded so quickly and its filterability is reduced. This increases the service life of the filter element. Conveniently, this can be achieved by providing an additional component on the raw side of the filter element. Such an additional component may expediently have lamellar elements which are suitable for the separation of water droplets or snow. Alternatively, both lamellar elements for water separation and flow guide elements can be arranged in an integrated additional component so as to effect both the separation of water from the raw air and a favorable flow of the filter bellows. The advantage of such an additional component for water separation is that so the Wasserabscheidefunktion can be integrated into the filter element and not, as usual, a second housing for a filter system with Wasserabscheidefunktion must be provided.

In another aspect, the invention relates to a filter system for filtering a fluid having a housing and a filter element interchangeable in the housing between a dirty side and a clean side for filtering a fluid. The filter element comprises at least one filter bellows which is folded in a zigzag fashion along fold edges lying in flat sides, which folds respectively extend between opposite end edges of the filter bellows and which has end edge surfaces running parallel to one another on opposite end faces. The filter bellows is encapsulated with plastic in the form of a frame, so that the end edge surfaces are sealed. At least one integrally formed with the frame additional component is provided, which is folded flat on one of the raw side or the clean side facing flat side.

The filter system is provided for receiving a filter element, in which one or more filter bellows are encapsulated with a plastic, so that the at least one filter bellows is firmly fixed and held in a kind of frame. The frame expediently seals off the end edge surfaces of the filter bellows by also injecting the end edges of the filter bellows. End faces of the filter bellows can be injected with. Alternatively, they can remain open. A circumferential end face of the frame may advantageously be provided with a seal for sealing the filter element when used in the housing of the filter system. The encapsulation of a filter bellows with plastic has several advantages. On the one hand, a sturdy frame is created in order to mechanically hold the filter bellows, stabilize them and make them manageable for assembly. On the other hand, the end edge surfaces are thus sealed, so that the filter bellows is thus applicable for use in a filter system.

According to the invention an additional component is provided in the filter element, for example, a flow or a Wasserabscheideelement which is integrally formed with the frame of the filter bellows and which can be folded flat on one of the flat sides of the filter bellows. In this way, the additional component sits directly on the frame and can be firmly connected to this and also sealed. The additional component can be connected to the frame via a flexible connection region so that the additional component can be folded over and folded onto the frame with the bent connection region.

According to an advantageous embodiment, the frame may be encapsulated with a seal which seals the clean side against the raw side. For example, a circumferential end face of the frame may advantageously be provided with a seal for sealing the filter element when used in a filter housing. The seal, which is injection-molded onto the frame, for example, is tight against the inside of the housing when the filter element is used and can thus seal a flat side of the filter element against the other flat side. Since the filter element is traversed by the fluid to be filtered from one flat side to the other flat side, in this way the clean side is separated and sealed against the raw side by the filter element.

According to an advantageous embodiment, the seal can connect the additional component to the longitudinal edges of the frame with the frame. The circumferential seal of the filter element when used in a filter housing is useful to ensure a reliable separation of the raw side and clean side of a filter system, as it is advantageous for a reliable filter process over a corresponding service life of the filter system. Advantageously, the circumferential seal on the longitudinal edges of the frame can be arranged so that it comprises a connection zone between the frame and the additional component and so by their strength causes a permanent and reliable connection of the frame and additional component. At the same time, the connection zone between the frame and the additional component is thereby also advantageously sealed off, which proves to be favorable from a fluid engineering point of view.

According to an advantageous embodiment, the seal may be arranged outside a connection zone of the additional component to the frame. The additional component can also be connected to the frame via other joining processes such as a latching connection, Bonding or welding can be connected. In that case, it is not necessary for the seal of the frame to assume a joining function for the additional component and, therefore, if necessary, it can also be arranged at a different point on the front sides of the frame than the connecting zone of the additional component for the frame. This arrangement outside the connection zone of the additional component to the frame may prove to be favorable due to the separation of the raw side and the clean side of the filter system, for example, if the housing is less polluted when changing the filter element.

According to an advantageous embodiment, an additional component can be arranged on both flat sides. The additional component can be designed for various functions, such as a flow guide or water separation. It may therefore be advantageous to arrange an additional component with a specific function, such as water separation, on the flat side facing the raw side and to arrange another additional component with a flow guide on the flat side of the filter element facing the clean side. Thus, a filter element can advantageously be formed with a plurality of additional components on both flat sides of the filter element.

The described filter system can advantageously be used as an air filter, in particular as an air filter of an internal combustion engine or as an interior air filter, in particular of a motor vehicle.

Brief description of the drawings

Further advantages emerge from the following description of the drawing. In the drawings, embodiments of the invention are shown. The drawings, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into meaningful further combinations.

They show by way of example:

1 an isometric view of a filter element with an additional component with flow directors on the clean side according to an embodiment of the invention;

2 a detailed view of the filter element in 1 with a focus on the connection of the additional component to the frame by means of a latching connection;

3 an isometric view of the filter element 1 with folded-down additional component;

4 an isometric view of the filter element 1 with folded-up additional component;

5 an isometric view of the filter element 1 with almost closed additional component;

6 an isometric view of the filter element 1 with attached to the frame additional component;

7 an isometric view of a filter element according to another embodiment with folded auxiliary component;

8th an isometric view of the filter element 7 with folded-up additional component;

9 an isometric view of the filter element 7 with almost closed additional component;

10 an isometric view of the filter element 7 with attached to the frame additional component;

11 an isometric view of the filter element 7 with attached to the frame additional component which is connected by means of a seal with the frame;

12 a detailed view of the filter element in 11 with a focus on the connection of the additional component to the frame by means of the seal;

13 an isometric view of a filter element according to another embodiment with an additional component on the raw side, which is designed for water separation;

14 an isometric view of the filter element 13 with folded-down additional component;

15 an isometric view of the filter element 13 with half-folded additional component;

16 a longitudinal section through the filter element 13 ; and

17 a longitudinal section through a filter system according to an embodiment of the invention with the filter element 13 ,

Embodiments of the invention

In the figures, the same or similar components are numbered with the same reference numerals. The figures are merely examples and are not intended to be limiting.

1 shows an isometric view of a filter element 10 with an additional component 16 with flow guide elements 44 on the clean side 52 according to an embodiment of the invention. The filter element 10 for filtering a fluid has a filter bellows 12 on, on in flat pages 38 . 39 the filter bellows 12 lying folding edges 26 zigzag to wrinkles 34 is folded, each between opposite end edges 22 . 23 the filter bellows 12 extend and each on opposite end faces 18 . 19 mutually parallel end edge surfaces 20 . 21 having. The filter bellows 12 is with plastic in the form of a frame 28 overmoulded, so that the front edge surfaces 20 . 21 are sealed. A one-piece with the frame 28 trained additional component 16 is on the clean side 52 facing flat side 38 the filter bellows 12 flat folded. The additional component 16 and the frame 28 are expediently designed as an injection molded part. The connection area 17 for connecting additional component 16 and frame 28 closes at the longitudinal edge 30 of the frame 28 to the frame 28 at, with the connection area 17 between additional component 16 and frame 28 as a movie hinge 36 is trained. The additional component 16 is with the in the connection zone 49 arranged locking connection 42 on the frame 28 lockable.

The filter element 10 is in the flow direction 54 flows through the fluid to be filtered. The additional component 16 has flow guide elements 44 on, which are provided for flow guidance of the fluid. The flow guide elements 44 extend parallel to the fold edges 26 because in this way an advantageous flow guidance of the filtered fluid with a uniform load of the filter bellows 12 is guaranteed. At the lower longitudinal edge 31 of the frame 28 is encircling the frame 28 the seal 40 arranged.

2 shows a detailed view of the filter element 10 in 1 with focus on the connection of the additional component 16 with the frame 28 by means of the latching connection 42 , The additional component 16 is on the flat side 38 to the frame 28 Folded and attacks with the snap hook 46 in the connection zone 49 around a fret of the frame 28 , This is the additional component 16 with the frame 16 firmly locked. Due to the elasticity of the plastic, this locking connection 42 by bending the snap hooks 46 , possibly with a suitable tool, also be solvable again.

In the 3 to 6 is off for the filter element 1 in isometric views of the course of the folding of the additional component 16 to the clean side facing flat side 38 the filter bellows 12 and the frame 28 the filter bellows 12 shown. 3 shows the filter element 10 with folded-down additional component. The connection area 17 is, for example, as a film hinge 36 , flexibly formed, so that the additional component 16 folded up and to the flat side 38 can be folded. In 4 is therefore the filter element off 1 with folded-up additional component 16 shown. The arrow should indicate the direction of movement during the folding process. In 5 is the filter element off 1 with almost closed additional component 16 to see while in it 6 with to the flat side 38 and the frame 28 folded-on additional component 16 is shown. The additional component 16 lies flat on the frame 28 on and is for example by means of the locking connection 42 as detailed in 2 shown with the frame 28 locked.

Alternatively, the additional component could 16 also by gluing or welding to the frame 28 be connected.

In the 7 to 10 is for a filter element according to another embodiment in isometric views of the course of the folding of the additional component 16 to the clean side facing flat side 38 the filter bellows 12 and the frame 28 the filter bellows 12 shown. In the filter element 10 in the 7 to 10 the connection between the additional component takes place 16 and frame 28 over a molded seal 40 , 7 shows the filter element 10 with folded-down additional component 16 , The connection area 17 is also here, for example, as a film hinge 36 flexibly formed, so that the additional component 16 folded up and to the flat side 38 can be folded. In 8th is the filter element 10 out 7 with folded-up additional component 16 shown. The arrow should again indicate the direction of movement during the folding process. 9 shows the filter element 10 out 7 with almost closed additional component 16 while in there 10 with to the flat side 38 and the frame 28 folded-on additional component 16 is shown. The additional component 16 lies flat on the frame 28 on.

11 shows in an isometric view the filter element 10 out 7 with to the frame 28 folded-on additional component 16 , which by means of the seal 40 in the connection zone 49 with the frame 28 connected is. The additional component 16 is about the at the longitudinal edges 30 of the frame 28 circumferential seal 40 with the frame 28 connected. The seal thus closes the outer edge 32 of the additional component 16 as well as the longitudinal edges 30 of the frame 28 encircling one. The poetry 40 For example, in a two-component injection molding process with the frame 28 be produced in an injection molding process.

12 shows a detailed view of the filter element 10 in 11 with focus on the connection of the additional component 16 with the frame 28 by means of the seal 40 , The additional component 16 lies flattened flat on the flat side 38 the filter bellows 12 and the frame 28 on. The frame 28 is at the longitudinal edges 30 encircling with the seal 40 overmoulded, which thereby also the outer edge 32 of the additional component 32 includes and connects so tightly.

In 13 is an isometric view of a filter element 10 according to a further embodiment with an additional component 16 on the raw side 50 to see which is designed for water separation. The additional component 16 has slat elements for it 48 on, which are provided for the separation of water from the fluid and thus enable integrated water separation of the filter element. The additional component 16 is on the raw side 50 facing flat side 39 the filter bellows 12 and the frame 28 folded and in the connection zone 49 via a locking connection 42 with the frame 28 connected. The connection area 17 in the form of a film hinge 36 is on the longitudinal edge 31 of the frame 28 arranged. The seal 40 by contrast, in the case of 13 shown embodiment circumferentially around the longitudinal edges 30 of the frame 28 the clean side 52 arranged adjacent.

14 shows an isometric view of the filter element 10 out 13 with folded-down additional component 16 , The additional component 16 with the lamellar elements 48 is in a plane with the frame 28 stretched out, as it can be removed for example from a tool of an injection molding process. For folding in the additional component 16 to the flat side 39 becomes the connection area 17 as a movie hinge 36 bent in the direction of the arrow, as in 15 at the filter element 10 with half folded additional component 16 is shown. After folding in the additional component 16 it can by means of the locking connection 42 with the frame 28 latched and so fixed for transport, installation and operation.

16 shows a schematic longitudinal section through the filter element 10 out 13 with to the flat side 39 and the frame 28 folded-on additional component 16 , The flat sides 38 . 39 the filter bellows 12 are through the fold edges 26 the folds 34 of the zigzag folded filter medium 14 Are defined. The filter bellows 12 is with the plastic-sprayed frame 28 on its front edge surfaces 20 . 21 sealed. The frame 28 points at its longitudinal edge 30 the circumferential seal 40 on for sealing the filter element 10 when installed in the housing 108 a filter system 100 as it is in 17 is shown.

The additional component 16 with the lamellar elements 48 , which on the longitudinal edge 31 of the frame 28 about as a movie hinge 36 trained connection area 17 with the frame 28 is integrally connected, is on the flat side 39 folded and with the frame over the snap connection 42 in the connection zone 49 firmly connected.

In 17 is a longitudinal section through a filter system 100 according to an embodiment of the invention with the filter element 10 out 13 shown. The filter system 100 for filtering a fluid has a housing 108 with an upper housing part 112 and a housing lower part 114 on. In the case 108 is between a raw page 50 and a clean side 52 the filter element 10 arranged interchangeably. The filter element 10 includes the filter bellows 12 that runs along in flat sides 38 . 39 lying folding edges 26 zigzag to wrinkles 34 is folded, each between opposite end edges 22 . 23 the filter bellows 12 extend, and each on opposite end faces 18 . 19 mutually parallel end edge surfaces 20 . 21 having. The filter bellows 12 is with plastic in the form of the frame 28 overmoulded, so that the front edge surfaces 20 . 21 are sealed. The one-piece with the frame 28 trained additional component 16 is on the raw side 50 facing flat side 39 flat folded. The frame 28 is with the seal 40 injected, which is the clean side 52 against the raw side 50 seals. The seal 40 lies with built-in filter element 10 on the inside of the case 108 and thus seals the clean side 52 of the filter system 100 against the raw side 50 from. The seal 40 is at the in 17 illustrated embodiment outside the connection zone 49 of the additional component 16 to the frame 28 arranged. Alternatively, it would also be conceivable that the seal 40 the additional component 16 at longitudinal edges 30 . 31 of the frame 28 with the frame 28 combines. Also could be an additional component 16 on both flat sides 38 . 39 of the filter element 10 be arranged, for example, an additional component 16 for water separation as shown on the raw side flat side 39 and another additional component 16 on the clean side flat side 38 for example, for flow guidance with flow guide elements 44 ,

In all embodiments, in each case at least one of the flat sides 38 . 39 completely from the additional component 16 spans. This does not necessarily mean that there is always a complete covering of the flat side in the direction of flow 38 . 39 is realized, as in the execution 13 , Rather, that spans additional component 16 the respective flat side 38 . 39 such that the entire flow cross section of the flat side 38 . 39 from the additional component 16 framed.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 2027908 B1 [0003]

Claims (16)

Filter element ( 10 ) for filtering a fluid with - at least one filter bellows ( 12 ), which is used in flat pages ( 38 . 39 ) of the filter bellows ( 12 ) folding edges ( 26 ) zigzag to wrinkles ( 34 ) is folded, each between opposite end edges ( 22 . 23 ) of the filter bellows ( 12 ) and in each case on opposite end faces ( 18 . 19 ) mutually parallel end edge surfaces ( 20 . 21 ), wherein the filter bellows ( 12 ) with plastic in the form of a frame ( 28 ) so that the front edge surfaces ( 20 . 21 ) and at least one integral with the frame ( 28 ) trained additional component ( 16 ) is provided which on one of the flat sides ( 38 . 39 ) can be folded flat. Filter element according to claim 1, wherein a connecting region ( 17 ) for connecting additional component ( 16 ) and frames ( 28 ) on a longitudinal edge ( 30 . 31 ) of the frame ( 28 ) to the frame ( 28 ). Filter element according to claim 1 or 2, wherein the additional component ( 16 ) and the frame ( 28 ) are formed as an injection molded part. Filter element according to one of the preceding claims, wherein the connection region ( 17 ) between additional component ( 16 ) and frames ( 28 ) as a film hinge ( 36 ) is trained. Filter element according to one of the preceding claims, wherein the additional component ( 16 ), in particular with a latching connection ( 42 ), on the frame ( 28 ) is lockable. Filter element according to one of the preceding claims, wherein the additional component ( 16 ) over one at longitudinal edges ( 30 . 31 ) of the frame ( 28 ) circumferential seal ( 40 ) with the frame ( 28 ) is connected or connectable. Filter element according to claim 6, wherein the seal ( 40 ) in a two-component injection molding process with the frame ( 28 ) is provided producible. Filter element according to one of the preceding claims, wherein the additional component ( 16 ) by gluing or welding to the frame ( 28 ) is connected or connectable. Filter element according to one of the preceding claims, wherein the additional component ( 16 ) Flow guide elements ( 44 ), which are provided for flow guidance of the fluid. Filter element according to claim 9, wherein the flow guide elements ( 44 ) parallel to the fold edges ( 26 ). Filter element according to one of the preceding claims, wherein the additional component ( 16 ) Lamellar elements ( 48 ), which are provided for the separation of water from the fluid. Filter system ( 100 ) for filtering a fluid with a housing ( 108 ) and one in the housing ( 108 ) between a raw page ( 50 ) and a clean page ( 52 ) interchangeable filter element ( 10 ) for filtering a fluid, in particular according to one of the preceding claims, comprising - at least one filter bellows ( 12 ) running along in flat pages ( 38 . 39 ) folding edges ( 26 ) zigzag to wrinkles ( 34 ) is folded, each between opposite end edges ( 22 . 23 ) of the filter bellows ( 12 ), and in each case on opposite end faces ( 18 . 19 ) mutually parallel end edge surfaces ( 20 . 21 ), wherein the filter bellows ( 12 ) with plastic in the form of a frame ( 28 ) so that the front edge surfaces ( 20 . 21 ) and at least one integral with the frame ( 28 ) trained additional component ( 16 ) is provided, which on one of the raw side ( 50 ) and / or the clean side ( 52 ) facing flat side ( 39 . 38 ) is folded flat. Filter system according to claim 12, wherein the frame ( 28 ) with a seal ( 40 ) which is the pure side ( 52 ) against the raw side ( 50 ) seals. Filter system according to claim 13, wherein the seal ( 40 ) the additional component ( 16 ) at longitudinal edges ( 30 . 31 ) of the frame ( 28 ) with the frame ( 28 ) connects. Filter system according to claim 13, wherein the seal ( 40 ) outside a connection zone ( 49 ) of the additional component ( 16 ) to the frame ( 28 ) is arranged. Filter system according to one of claims 12 to 15, wherein on both flat sides ( 38 . 39 ) an additional component ( 16 ) is arranged.

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